linux-kernel - [PATCH 0/3] workqueue: Cleanup affnity for detached/DISASSOCIATED workers

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Message-Id: <20251117030913.3084-1-jiangshanlai@gmail.com>
Date: Mon, 17 Nov 2025 11:09:10 +0800
From: Lai Jiangshan <jiangshanlai@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Lai Jiangshan <jiangshan.ljs@...group.com>,
	Juri Lelli <juri.lelli@...hat.com>,
	Waiman Long <longman@...hat.com>,
	Tejun Heo <tj@...nel.org>,
	Lai Jiangshan <jiangshanlai@...il.com>
Subject: [PATCH 0/3] workqueue: Cleanup affnity for detached/DISASSOCIATED workers

From: Lai Jiangshan <jiangshan.ljs@...group.com>

The commit d64f2fa064f8 ("kernel/workqueue: Let rescuers follow unbound
wq cpumask changes") updates the affinity for unbound wq's rescuer.

Do extra cleanup to make it more consistent:

consistency with the workers:
  * Not for attached rescuers which are managed by pool's affinity
  * Also for PERCPU wq's detached rescuers
  * Also for DISASSOCIATED pools' workers
  * Also for newly created rescuers (starting from without attached)

consistency with the affinity:
  * use wq_unbound_cpumask in all the cases.

Lai Jiangshan (3):
  workqueue: Update the rescuer's affinity only when it is detached
  workqueue: Let DISASSOCIATED workers follow unbound wq cpumask changes
  workqueue: Init rescuer's affinities as wq_unbound_cpumask

Cc: Juri Lelli <juri.lelli@...hat.com>
Cc: Waiman Long <longman@...hat.com>
Cc: Tejun Heo <tj@...nel.org>,
Cc: Lai Jiangshan <jiangshanlai@...il.com>

 kernel/workqueue.c | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)

-- 
2.19.1.6.gb485710b